California sea otter (Enhydra lutris nereis) census results, spring 2018

Data Series 1097
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Abstract

The 2018 census of southern sea otters (Enhydra lutris nereis) was conducted from late April to mid-May along the mainland coast of central California and in April at San Nicolas Island in southern California. The 3-year average of combined counts from the mainland range and San Nicolas Island was 3,128, a decrease of 58 sea otters from the previous year. The 5-year average trend in abundance, including both the mainland range and San Nicolas Island populations, remains positive at 1.3 percent per year. Continuing lack of growth in the range peripheries likely explains the cessation of range expansion.

Suggested Citation

Hatfield, B.B., Yee, J.L., Kenner, M.C., Tomoleoni, J.A., and Tinker, M.T., 2018, California sea otter (Enhydra lutris nereis) census results, spring 2018: U.S. Geological Survey Data Series 1097, 10 p., https://doi.org/10.3133/ds1097.

ISSN: 2327-638X (online)

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Table of Contents

  • Abstract
  • Introduction and Methods
  • California Sea Otter Census Results
  • Acknowledgments
  • References Cited

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title California sea otter (Enhydra lutris nereis) census results, spring 2018
Series title Data Series
Series number 1097
DOI 10.3133/ds1097
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Western Ecological Research Center
Description Report: iv, 10 p.; Data release
Country United States
State California
Online Only (Y/N) Y